Question: Object A is stationary while objects B and C are in motion. Forces from object A do 10 J of work on object B and

Object A is stationary while objects B and C are in motion. Forces from object A do 10 J of work on object B and –5 J of work on object C. Forces from the environment do 4 J of work on object B and 8 J of work on object C. Objects B and C do not interact. What are ΔK_tot and ΔU_int if

(a) Objects A, B, and C are defined as separate systems

(b) One system is defined to include objects A, B, and C and their interactions?

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